DuroStar DUAL FUEL DS12000EH User Manual
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DuroStar DUAL FUEL DS12000EH User Manual

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DS12000EH
U
S
E
R
M
A
N
U A
L
REV: DS12000EH-06292022
5800 Ontario Mills Pkwy
This manual provides information regarding the
Ontario, CA 91764 USA
operation and maintenance of these products. We
www.duromaxpower.com
have made every effort to ensure the accuracy of the
Call our Customer Care Team Toll Free 8-5 pm PST Mon-Fri
information in this manual. We reserve the right to
844-DUROMAX
change this product at any time without prior notice.

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  • Page 1 DS12000EH REV: DS12000EH-06292022 5800 Ontario Mills Pkwy This manual provides information regarding the Ontario, CA 91764 USA operation and maintenance of these products. We www.duromaxpower.com have made every effort to ensure the accuracy of the Call our Customer Care Team Toll Free 8-5 pm PST Mon-Fri information in this manual.

  • Page 3: Table Of Contents

    CONTENTS Introduction Introduction ........................6 General Safety Procedures ................... 8 Unit and Purchase Information .................. 12 Carbon Monoxide Safety ..................... 13 Generator Components Generator Components ....................16 Package Contents ......................18 Generator Setup Remove Shipping Braces .................... 21 Wheel Kit Installation ....................22 Connect the Battery ....................
  • Page 4 CONTENTS Maintenance and Care Maintenance Schedule ....................52 Break-In Period ......................53 Maintenance Log......................53 Checking the Oil ......................54 Changing the Oil ......................55 Cleaning the Air Filter ....................56 Spark Plug Maintenance ....................58 Emptying the Gas Tank ....................60 Cleaning the Fuel Filter Cup ..................
  • Page 6 THE DUROSTAR WAY The DuroStar Way is more than just a brand, it is our understanding and appreciation of just how important power can be to someone without it… DUROSTAR FOR HOME DUROSTAR FOR WORK DUROSTAR FOR PLAY Electricity in our home not...

  • Page 7: Introduction

    INTRODUCTION DuroStar Power Equipment is headquartered in Ontario, California and is the industry’s leader in Dual Fuel portable generator technology. In addition to a full assortment of portable generators ranging from digital inverters to large 15,000-watt portable standby units, their product line includes pressure washers, engines, pumps, and accessories.

  • Page 8: General Safety Procedures

    GENERAL SAFETY PROCEDURES SAFETY ALERT SYMBOL The safety alert symbol is used with one of the safety words (DANGER, WARNING, or CAUTION) to alert you of hazards. Please pay attention to these hazard notices both in this manual and on the engine. Please familiarize yourself with the following safety symbols and words: ●...
  • Page 9 WARNING: This generator may emit highly flammable and explosive gasoline vapors, which can cause severe burns or even death. A nearby open flame can lead to an explosion even if not directly in contact with gasoline. ● Do not operate near an open flame. ●...
  • Page 10 GENERAL SAFETY PROCEDURES In addition to the above safety notices, please familiarize yourself with the safety and hazard markings on the generator. DANGER DO NOT OVERFILL 1.5” THE GAS TANK OVERFILLING CAN RESULT IN A FIRE, EXPLOSION, OR DEATH.
  • Page 11 CAUTION HIGH TEMPERATURE DON’T TOUCH HOT EXHAUST DANGER KEEP SAFE DISTANCE BURN RISK CARBON MONOXIDE SAFE DISTANCE DON’T TOUCH...

  • Page 12: Unit And Purchase Information

    UNIT AND PURCHASE INFORMATION Serial Number Serial number The serial number is located on the engine block, above and to the left of the oil fill. Serial number format The serial number will be shown in two parts. The engine model, followed by the serial number.

  • Page 13: Carbon Monoxide Safety

    As the only safe way to use a portable generator, taking your generator outside is absolutely mandatory to keep your family safe from carbon monoxide. But there’s even more you can do. By educating yourself about all carbon monoxide risks, you’ll be better prepared to protect your family from this colorless, odorless threat.
  • Page 15 GENERATOR COMPONENTS To help you get familiar with your new DuroStar generator, please see this component section for easy reference on all the generator’s individual features.

  • Page 16: Generator Components

    GENERATOR COMPONENTS 6. 120/240V 4-Prong 8. 120V 3-Prong 20. 120V 3-Prong Twist Lock Receptacle Twist Lock 2. Choke Lever 22. Idle Control 5. Circuit Breaker 10. Volt Meter 23. Power Boost 16. Fuel Valve 7. Ground Terminal 1. Air Filter 11.
  • Page 17 15. Fuel Filter Cup 3. Fuel Gauge 4. Fuel Cap 17. Spark Plug 18. Muffler 19. Propane Connector 13. Engine Switch – 3 Position Switch to “START”, “RUN”, or turn “OFF” the generator. 14. Recoil Start – Easy pull recoil start to start the engine without the electric start. 15.

  • Page 18: Package Contents

    PACKAGE CONTENTS Your generator comes with the items listed below. Please check to see that all of the following items are included with your generator. Double-Sided Spanner Spark Plug Wrench Screw Driver Phillips and slot blade Assorted wrenches used in Used in spark plug screwdriver used for generator generator maintenance and...

  • Page 19: Generator Setup

    GENERATOR SETUP Proper setup of your generator will get you going as soon as possible while making sure you and your equipment are safe and cared for.

  • Page 21: Remove Shipping Braces

    GENERATOR SETUP Step 1 - Remove Shipping Braces Unpack Remove the generator from the box. Place the largest piece of packing foam on a flat surface. Flip the generator upside down on the pad. CAUTION: NEVER attempt this if you have put fuel or oil in the generator.

  • Page 22: Wheel Kit Installation

    GENERATOR SETUP (CONTINUED) Step 2 - Wheel Kit Installation (Optional) Step 2 - Wheel Kit Installation (Optional) Install support legs Secure the support legs to the frame with the provided lock nuts. Install wheel axles Place the smallest washer onto the wheel axle bolts. Insert wheel axle bolts through the frame and secure with the provided nut and wrenches.
  • Page 23 Install outside wheel washers Place the other large washers onto the axles. Install cotter pins Place the cotter pin through the hole at the end of the axle and bend it out to secure the wheel. Install handles Attach the handles to the brackets on the frame using the provided bolts and nuts.

  • Page 24: Connect The Battery

    GENERATOR SETUP (CONTINUED) Step 3 - Connect the Battery Remove the battery cover Remove the battery cover plate using the wrench from the toolkit. Locate the negative cable Locate the negative battery cable above and behind the battery. One side is connected to ground and the other end needs to be connected to the battery.

  • Page 25: Adding Oil

    Step 4 - Adding Oil The generator requires engine oil to operate properly. The generator, when new from the package, contains no oil in the crankcase . You must add the proper amount of oil before operating the generator for the first time. This amount is equal to the oil capacity of the engine crankcase: Model Number DS12000EH Engine Oil Capacity...

  • Page 26: Adding Gasoline

    GENERATOR SETUP (CONTINUED) Step 5 - Adding Gasoline (Optional) Add gasoline Make sure the generator is on a level surface. Unscrew gas cap and set aside (NOTE: the gas cap may be tight and hard to unscrew). Slowly add unleaded gasoline to the fuel tank. Be careful not to overfill.

  • Page 27: Grounding The Generator

    Step 6 - Grounding the Generator Attach grounding wire Ground the generator by tightening the grounding nut against a grounding wire. Connect the other end to a copper or brass grounding rod that’s driven into the earth. A generally acceptable grounding wire is a No. 12 AWG (American Wire Gauge) stranded copper wire.

  • Page 29: Starting The Generator

    STARTING THE GENERATOR If this is not your first time using the generator there are still steps you should take to prepare it for operation each time you use it. IMPORTANT: At this point you should be familiar with the procedures described in the first portion of this section entitled “GENERATOR SETUP”...

  • Page 30: Check The Oil

    BEFORE YOU START YOUR GENERATOR Step 1 - Check the Oil Check the oil The generator is equipped with an automatic shutoff to protect it from damage due to low oil. Nonetheless, you should check the oil level of the engine before each use to ensure that the engine crankcase has a sufficient amount.

  • Page 31: Check The Gas Level

    Step 2 - Check the Gas Level (Optional) Check fuel level If running the engine on gasoline check to see that there is sufficient gasoline in the fuel tank. The fuel gauge on top of the tank will give a rough estimate of the gasoline level. The gauge will appear white then fill red as the tank is filled.

  • Page 32: Starting The Generator Using Gasoline

    STARTING THE GENERATOR Starting the Generator Using Gasoline Shut breaker OFF The breaker is located on the right side of the front power panel. Flip the breaker down to prevent accidental load when starting the generator. Turn gas valve ON The gas valve is located above the recoil start on the bottom of the fuel tank.
  • Page 33 Turn engine switch to START The key switch is located on the left side of the front power panel. Insert the key and turn to the “START” position to start the generator. Allow the key to return to the run position once started.

  • Page 34: Starting The Generator Using Propane

    STARTING THE GENERATOR (CONTINUED) Starting the Generator Using Propane Shut breaker OFF The breaker is located on the right side of the front power panel. Flip the breaker down to prevent accidental load when starting the generator. Turn gas valve OFF The gas valve is located above the recoil start on the bottom of the fuel tank.
  • Page 35 Close choke The choke lever is located above the air filter to the left of the recoil start. Slide the lever to the left to cut the air supply and allow more gas into the engine to start. Turn engine switch to START The key switch is located on the left side of the front power panel.
  • Page 36 STARTING THE GENERATOR (CONTINUED) Starting the Generator Using Propane WARNING: WHEN USING THE GENERATOR WITH LPG, MAKE SURE THERE IS NO POSSIBLE IGNITION SOURCE CLOSE TO THE GENERATOR. 1. Before using, make sure all of the LPG connectors and hoses are well connected and sealed.

  • Page 38: Starting The Generator Using Recoil Start

    STARTING THE GENERATOR (CONTINUED) Starting the Generator Using Recoil Start Shut breaker OFF The breaker is located on the right side of the front power panel. Flip the breaker down to prevent accidental load when starting the generator. Select your fuel If using gasoline, see step 2 on pg.
  • Page 39 Turn idle control OFF The idle control is located on the top center of the main power panel. Turn the switch “OFF” to prevent the unit from trying to idle down before the engine is warmed up. Pull the recoil start The recoil start is located on the left side panel next to the air filter.

  • Page 41: Using The Generator

    USING THE GENERATOR If this is not your first time using the generator there are still steps you should take to prepare it for operation each time you use it. IMPORTANT: At this point you should be familiar with the procedures described in the first portion of this section entitled “GENERATOR SETUP”...

  • Page 42: Ac Usage

    USING THE GENERATOR AC Usage ● You may connect electrical devices running on AC current according to their wattage requirements. ● The chart below shows the rated and surge wattage of your generator according to its model number. ● The rated wattage corresponds to the maximum wattage the generator can output on a continuous basis.
  • Page 43 Tool or Appliance Rated (Running) Watts Additional Surge Watts Electric water heater (40 gal) 4000 Hot plate 2500 Radial arm saw 2000 2000 Electric Stove 1500 Circular Saw 1500 1500 Air compressor (1 HP) 1500 3000 Window air conditioner 1200 1800 Miter saw 1200...

  • Page 45: Connecting The Generator To A Home

    Connecting the Generator to a Home Extension cords ● The most straightforward and affordable option. ● Zero commitment, no installation needed: Simply plug in your appliances and go! ● Perfect for renters, RV/camping trips, and power on the job-site. Transfer switch ●...

  • Page 46: Connecting A Load To The Generator

    USING THE GENERATOR (CONTINUED) Connecting a Load to the Generator NOTE: Be sure to attach devices to the correct receptacle (outlet). 120V devices can be directly connected to the 120V ONLY receptacles. ● ● 120V devices can be connected to the 120/240V receptacle using an appropriate adapter. ●...

  • Page 47: Choosing The Right Power Cord

    Choosing the Right Power Cord Long or thin cords can drain the power provided to an electrical device by the generator. When using such cords, allow for a slightly higher rated wattage requirement for the electrical device. See the table below for recommended cords based on the power requirement of the electrical device. DEVICE REQUIREMENTS WIRE GAUGE BY LENGTH (ft.) AMPS...

  • Page 48: Dc Usage

    USING THE GENERATOR (CONTINUED) DC Usage DC Usage Connect the battery Connect one charging wire to the positive terminal on the battery and the other charging wire to the negative terminal on the battery. Connect positive receptacle Connect the free end of the positive wire to the positive receptacle (outlet) on the generator.
  • Page 49 Disconnecting battery When disconnecting, always disconnect the wires from the generator first to avoid a spark. CAUTION: The DC receptacle is for recharging 12 Volt automotive-type batteries only. Do not connect any other device to this receptacle. CAUTION: Never try to jump start a car with your generator. DANGER: Stored batteries emit highly explosive hydrogen gas when charged.

  • Page 50: Voltage Selector Switch

    USING THE GENERATOR (CONTINUED) USING THE GENERATOR (CONTINUED) Voltage Selector Switch This generator features Power Boost Technology, which gives the user the ability to double the power in the generator for more heavy duty applications. The voltage selector switches the dual 120V AC windings of the generator to produce “120V ONLY”...

  • Page 51: Maintenance And Care

    MAINTENANCE AND CARE Proper maintenance and storage of your generator is essential to ensure trouble free use of your generator when you need it. By following the maintenance and care requirements, you can keep your generator running smooth and efficient for years to come.

  • Page 52: Maintenance Schedule

    MAINTENANCE AND CARE Proper routine maintenance of your generator is essential for safe, economical, and trouble-free operation. It will also help reduce air pollution. WARNING: Improper maintenance, or failure to correct a problem before operation, can cause a malfunction in which you can be seriously injured or killed. Always follow the inspection, maintenance recommendations, and schedules in this instruction manual.

  • Page 53: Break-In Period

    Break-In Period As the best practice for any new combustion motor it’s recommended to perform the break in procedure as follows: ● Run the generator for the first 6-8 hours on conventional oil, then change the oil. After the break-in period synthetic oil may be used. ●...

  • Page 54: Checking The Oil

    MAINTENANCE AND CARE (CONTINUED) Checking the Oil Check the oil The generator is equipped with an automatic shutoff to protect it from damage due to low oil. Nonetheless, you should check the oil level of the engine before each use to ensure that the engine crankcase has a sufficient amount.

  • Page 55: Changing The Oil

    Changing the Oil CAUTION: Worn out or dirty oil does not cool the generator properly and can lead to catastrophic engine damage. In addition to regular oil changes, it is necessary to drain the oil from the crankcase if it has become contaminated with water or dirt.

  • Page 56: Cleaning The Air Filter

    MAINTENANCE AND CARE (CONTINUED) Cleaning the Air Filter Routine maintenance of the air cleaner helps maintain proper airflow to the carburetor. Check that the air cleaner is free of excessive dirt after every use. CAUTION: Improper maintenance may cause less air to enter the engine or dirty air to enter the engine causing overheating and engine wear.
  • Page 57 Wash cleaner element Wash the sponge-like elements in household dish detergent and warm water. Dry cleaner element Pat dry on a dry cloth and allow the elements to dry completely. Add engine oil to elements Soak the dry elements in a small amount of engine oil. Ring out any excess oil.

  • Page 58: Spark Plug Maintenance

    MAINTENANCE AND CARE (CONTINUED) Spark Plug Maintenance The spark plug is important for proper engine operation. SPARK PLUG A good spark plug should be intact, free of deposits, and CONSULT MANUAL properly gapped. BEFORE REMOVING CAUTION: Improper maintenance may cause reduced fuel economy, misfires, trouble starting, or damage to the spark plug threads.
  • Page 59 Measure plug gap Measure the plug gap with a gauge. The gap should be 0.7-0.8 mm (0.028-0.031 in). Clean and re-gap If you are re-using the spark plug, use a wire brush to clean any dirt from around the spark plug base and then re-gap the spark plug.

  • Page 60: Emptying The Gas Tank

    MAINTENANCE AND CARE (CONTINUED) Emptying the Gas Tank If you have been using gasoline in your generator, before storing your generator for extended periods of time you should drain your generator fuel tank of gasoline. CAUTION: Do not store fuel from one season to another.
  • Page 61 Drain gas from the generator With a funnel underneath the fuel valve to catch the gas, turn the fuel valve to the “ON” position. Drain all the gas from the generator. Shut fuel valve OFF Turn the fuel valve to the “OFF” position. Replace fuel filter cup Reinstall the fuel filter cup.

  • Page 62: Cleaning The Fuel Filter Cup

    MAINTENANCE AND CARE (CONTINUED) Cleaning the Fuel Filter Cup Shut fuel valve off Turn the fuel valve to the “OFF” position. Remove fuel filter cup Unscrew the fuel filter cup from the fuel valve using a wrench. Clean filter cup Clean the cup of all sediment using a rag or brush.

  • Page 63: Transporting The Generator

    Transporting the Generator Empty the gas tank Fully drain your gas tank as shown in “Emptying the Gas Tank” on page 60-61. Disconnect the spark plug Pull on spark plug cap to disconnect spark plug from ignition wire. CAUTION: Do not obstruct any ventilation openings and keep the generator in a cool dry area.

  • Page 64: Storing The Generator For Same Day Use

    MAINTENANCE AND CARE (CONTINUED) Storing the Generator for Same Day Use Turn the main breaker OFF Move the main breaker to the “OFF” position. Run the generator Allow the generator to run for 3-5 minutes. Turn the key switch OFF Turn the key switch counter-clockwise to the “OFF”...

  • Page 65: Storing The Generator For Use Within 30 Days

    Storing the Generator for Use Within 30 Days Turn breaker OFF and run Follow steps 1 and 2 as shown on “Storing the Generator For Same Day Use” on page 64. Shut fuel valve OFF and run dry Shut the fuel valve “OFF” and allow generator to run until it stalls out.

  • Page 66: Storing The Generator For Longer Than 30 Days

    MAINTENANCE AND CARE (CONTINUED) Storing the Generator for Longer Than 30 Days Turn breaker OFF and run Follow steps 1 and 2 as shown on “Storing the Generator For Same Day Use” on page 64. Shut fuel valve OFF and run dry Shut the fuel valve “OFF”...
  • Page 67 Drain the carburetor Remove drain bolt from carburetor and drain small amount of fuel in carburetor bowl. Remove spark plug Remove spark plug as shown in “Spark Plug Maintenance” on page 58. Add oil to cylinder Add 2 tablespoons of 10W-30 motor oil directly into the spark plug hole, and pull the recoil to lubricate cylinder.

  • Page 68: Specifications

    SPECIFICATIONS Model Number DS12000EH AC Rated Wattage (Gasoline) 9,500 W AC Rated Wattage (Propane) 9,025 W AC Surge Wattage (Gasoline) 12,000 W AC Surge Wattage (Propane) 11,400 W AC Rated Voltage 120/240V Dimensions 29”L x 30”W x 26”H Weight 224 lbs Recommended Oil 10W-30 Engine Displacement...

  • Page 69: Troubleshooting

    TROUBLESHOOTING This section of the manual is to help you troubleshoot problems with your generator.

  • Page 70: Basic Troubleshooting

    TROUBLESHOOTING Problem Description Solution Engine switch is “Off” Set engine switch to “On” Fuel valve is “Closed” Turn the fuel valve to “Open” Choke is open Close the choke The engine is out of fuel Add fuel The engine will not Fuel is old or contaminated Change fuel start...

  • Page 71: Changing/ Inspecting The Carbon Brushes

    Changing/ Inspecting the Carbon Brushes The carbon brushes in conjunction with the AVR regulates power from the generator. The carbon brushes are wearable parts and should be inspected every 250 running hours. Remove generator cover Remove the 2 bolts of the generator cover then pull the cover off the generator.
  • Page 72 TROUBLESHOOTING (CONTINUED) Changing / Inspecting the Carbon Brushes (Cont.) Changing/ Inspecting the Carbon Brushes (Cont.) Install new brush Install new carbon brush with bolt. Connect AVR wires Insert and connect the 2 wires from the AVR, be sure to connect + and –...

  • Page 73: Changing/ Inspecting The Avr

    Changing/ Inspecting the AVR The carbon brushes in conjunction with the AVR regulates power from the generator. If the generator is overheated or overloaded, the AVR may be damaged and require replacement. Remove generator cover Remove the 2 bolts of the generator cover then pull the cover off the generator.
  • Page 74 TROUBLESHOOTING (CONTINUED) Changing/ Inspecting the AVR (Continued) Disconnect wires from brush Remove the 2 wires from the AVR on the carbon brush. Install new AVR Install the new AVR with the 2 bolts. Reconnect wires to brush Insert and connect the 2 wires from the AVR, be sure to connect + and –...
  • Page 75 Replace generator cover Replace the back cover of the generator and secure it with the 2 bolts.

  • Page 76: Wiring Diagram

    WIRING DIAGRAM...

  • Page 78: Warranty

    WARRANTY 3-year Warranty All DuroMax Power Equipment warrant the original purchasers to a 3-year Parts Warranty (Residential Use ONLY: Unusually heavy or commercial use is covered for a period of 1-year) in the event of failure due to defects in electrical or mechanical components. Freight on any items submitted for replacement or repair under the Warranty is the responsibility of the equipment owner.
  • Page 79 maintenance listed in your owner’s manual. DuroMax Power Equipment recommends that you retain all receipts covering maintenance on your small off-road engine, but DuroMax Power Equipment cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.
  • Page 80 WARRANTY (CONTINUED) Subsection (4) below. Any such part repaired or replaced under the warranty must be warranted for the remaining warranty period. (2) Any warranted part that is scheduled only for regular inspection in the written instructions required by subsection(d)must be warranted for the warranty period defined in Subsection(b) (2).
  • Page 81 Exhaust Emission Warranty Parts List. (1) Fuel Metering System (7) Particulate Controls (i) Carburetor and internal parts (and/or (i) Traps, filters, precipitators, and any pressure regulator or fuel injection other device used to capture particulate emissions. system). (ii) Air/fuel ratio feedback and control (8) Miscellaneous Items Used in Above Systems system.

  • Page 82: Customer Service

    CUSTOMER SERVICE Duromax Power Equipment is committed to ensuring that our products perform when they need to. Our generators are your lifeline in the event of an emergency. Should you have any problems, please contact our customer service department: DUROMAX POWER EQUIPMENT 5800 Ontario Mills Parkway Ontario, CA 91764 Customer Service: 844-DUROMAX...
  • Page 84 5800 Ontario Mills Parkway Ontario, CA 91764 United States 844-DUROMAX REV: DS12000EH-06292022...

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